Anti-cancer activity and mechanistic features of a NK cell activating molecule

Hyung Ran Kim, Kyoung Ho Lee, Su Jung Park, So Young Kim, Young Keun Yang, Jinsung Tae, Jongsun Kim

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Natural cytotoxicity receptors (NCRs) are major activating receptors involved in NK cytotoxicity. NCR expression varies with the activation state of NK cells, and the expression level correlates with NK cells' natural cytotoxicity. In this study, we found that Gö6983, a PKC inhibitor, induced a remarkable increase of NCR expression on primary NK cells, but other PKC inhibitors and NK cell stimulators such as IL-2 and PMA, did not. Gö6983 increased the expression of NCR in a time- and concentration-dependent manner. Furthermore, Gö6983 strongly upregulated the surface expression of death ligands FasL and TRAIL, but not cytotoxic molecules perforin and granzyme B. Unlike two other NK stimulating molecules, IL-2, and PMA, Gö6983 did not induce NK cell proliferation. Up-regulation of NCRs and death ligands on NK cells by Gö6983 resulted in a significant enhancement of NK cytotoxicity against various cancer cell lines. Most importantly, administration of Gö6983 effectively inhibited pulmonary tumor metastasis in mice in a dose-dependent manner. These results suggest that Gö6983 functions as an NK cell activating molecule (NKAM); this NKAM is a novel anti-cancer and anti-metastasis drug candidate because it enhances NK cytotoxicity against cancer cells in vivo as well as in vitro.

Original languageEnglish
Pages (from-to)1691-1700
Number of pages10
JournalCancer Immunology, Immunotherapy
Issue number10
Publication statusPublished - 2009 Oct

Bibliographical note

Funding Information:
Acknowledgments This study was supported in part by a basic research grant (R01-2007-000-20089-0) and by a medical research center grant (R13-2002-054-03003-0) of KOSEF.

All Science Journal Classification (ASJC) codes

  • Immunology and Allergy
  • Immunology
  • Oncology
  • Cancer Research


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